In the appendix, I want to include several images, one image per page (imagine reproductions of a manuscript). Centering it horizontally works fine, but how can I vertically center the image on the page? I was unable to find an answer online, there must be a simple solution.

Okay, maybe I was too quick to consider it solved. I was perfectly able to center one image on a page. However, oddly, several images added behind each other do not align. I tried it with and without a new page or a page break between each image. They are all identical with \vspace*{\fill} before and after the image. Why are they nevertheless positioned differently?

Thanks! This didn't change anything though. I also noticed that it makes a difference if a comment section is added at the end or not (why?). Now all images are a bit too low on the page, that is the gap to the bottom is smaller, although the margins are set the same.

Okay, now, after I deleted the closing comment section, the last image is aligned with the first. They seem all placed a bit too low, is that right?I've got another question for which I'll open another thread.Edit: Well, the other question concerned hyphenation. My hyphenation rule did not work because \usepackage{babel} followed after \hyphenation{Renais-sance}. To put it behind I seem to have to include it as a TeX code in the LyX document itself instead of the preamble.